Ashida ADR241B, Instruction Manual

Page: 29 / 272

ADR241B
Doc ID : ADR241B-DO_IM_01
Ref ID : ADR241B/IM/I&S
Rev No. : 06
Page No. : 29 of 272
For operating
Time
IDMT Characteristic shape As per class5 of 60255-151 cl.5.2**
or 50ms whichever is greater
DT Operation ±5% or 50ms whichever is greater*
Note “ * “ indicates Reference Condition that is Fault current 2 time
above rated value.
IV.
Negative Sequence Over current:
For operating
Value Pick-up 1.05 x Setting ±5%
Drop –off 0.95 x Setting ±5%
For operating
Time IDMT Characteristic shape As per class5 of 60255-151 cl.5.2**
or 50ms whichever is greater
DT Operation ±5% or 50ms whichever is greater*
Note “ * “ indicates Reference Condition that is Fault current 2 time
above rated value
V.
Broken Conductor (i2/i1)
For operating
Value Pick-up 1.05 x Setting ±5%
Drop –off 0.95 x Setting ±5%
For operating
Time DT Operation
±5% or 50ms whichever is greater
VI.
2nd Harmonic:
For operating
Value 2ndHrmThreshold Setting ±15%
I>UB2H Setting ±15%
VII. Thermal Overload:
For operating
Time Thermal Trip operation ± 10% of calculated time
VIII. Under current:
For operating
Value Pick-up 0.95 x settings ± 7.50%
Drop –off 1.05 x settings ± 7.50%
For operating
Time DT Operation ± 5% or ± 50ms Whichever is greater
IX.
Cold Load:
Cold Load
Time CLP Timer Setting ± 10%
For operating
Value Pick-up 1.05 x Setting ±5%
Drop –off 0.95 x Setting ±5%
For operating
Time IDMT Characteristic shape As per class5 of 60255-151 cl.5.2**
or 50ms whichever is greater
DT Operation ±5% or 50ms whichever is greater *
* Reference Condition Fault current 2 time above rated value